
7
4. Input Gain: Use these Input Gain Potentiometers to match the
output voltage of your headunit / source unit to the input circuit
of your amplier. These Input Gains are not a volume knob.
A simple method of setting your Input Gains is to turn your
headunit / source unit up to approximately ¾ volume. Then
slowly adjust your Input Gains on your ampliers clockwise until
you can hear distortion from your speakers or subwoofers. Then
turn the gains down (counterclockwise) till the distortion is no
longer heard and your clipping indicators are not lit.
5 Clipping Led Indicators: These LED’s will light up when the
amplier output signal is being clipped. When the LED’s starts
to glow, your amplifier output is between 1-2% THD (Total
Harmonic Distortion). When the clipping indicators are fully lit,
your amplier output is between 6-7% THD (Total Harmonic
Distortion). The ideal gain setting is where the clip indicators are
not lit allowing the amplier to send undistorted clean output.
Setting the ampliers gains improperly where the clip indicators
are always lit will over-work the amplifier and may cause
excessive heat building and possibly product failure.
6. High Pass Filter Frequency Filter (AC1100.5D Only): These
potentiometers allow you to adjust the crossover frequency of
Channels 1 - 4 from 40Hz – 400Hz.
6A. Crossover Filter Selector (AC1500.6D Only): Depending
on how you will use your AC Amplier, you will select the appropriate
setting on the Crossover switch. Set the Crossover Switch to
LP (Low Pass) mode if you are using Subwoofers or MidBass
drivers. Set the switch to HP (High Pass) if you want the
amplier’s internal crossover to serve as a high pass lter. When
the switch is set to the Full position, this will allow the amplier
to send its full bandwidth to your speakers. Avoid changing the
crossover switches with the audio system playing at high
volumes as this may damage your speakers.
6B. Filter Frequency (AC1500.6D Only): This potentiometer
will be active when setting your amplier in either High Pass
(HP) or Low Pass (LP) Mode and allows you to adjust the
crossover frequency from 40Hz – 400Hz.
Side Panel Layout Continued